Coefficient of Variation

It is the standard deviation divided by the mean (the worksheet reports the quotient, it does not convert the value to a percentage). The coefficient of variation is a dimensionless measure of variation. This statistic is not defined for the case of a zero mean. In fact, this measure is only useful when dealing with strictly positive data.

Population Coefficient of Variation (V)

$image\popcov.gif$

Sample Coefficient of Variation (V)

$image\samcov.gif$

where

$image\popsd-sym.gif$	= Population Standard Deviation
S	= Sample Standard Deviation
$image\u.gif$	= Population Mean
$image\mean.gif$	= Sample Mean